1 // Because sometimes you need to mark the selected *text*. 2 // 3 // Adds an option 'styleSelectedText' which, when enabled, gives 4 // selected text the CSS class given as option value, or 5 // "CodeMirror-selectedtext" when the value is not a string. 6 7 (function(mod) { 8 if (typeof exports == "object" && typeof module == "object") // CommonJS 9 mod(require("../../lib/codemirror")); 10 else if (typeof define == "function" && define.amd) // AMD 11 define(["../../lib/codemirror"], mod); 12 else // Plain browser env 13 mod(CodeMirror); 14 })(function(CodeMirror) { 15 "use strict"; 16 17 CodeMirror.defineOption("styleSelectedText", false, function(cm, val, old) { 18 var prev = old && old != CodeMirror.Init; 19 if (val && !prev) { 20 cm.state.markedSelection = []; 21 cm.state.markedSelectionStyle = typeof val == "string" ? val : "CodeMirror-selectedtext"; 22 reset(cm); 23 cm.on("cursorActivity", onCursorActivity); 24 cm.on("change", onChange); 25 } else if (!val && prev) { 26 cm.off("cursorActivity", onCursorActivity); 27 cm.off("change", onChange); 28 clear(cm); 29 cm.state.markedSelection = cm.state.markedSelectionStyle = null; 30 } 31 }); 32 33 function onCursorActivity(cm) { 34 cm.operation(function() { update(cm); }); 35 } 36 37 function onChange(cm) { 38 if (cm.state.markedSelection.length) 39 cm.operation(function() { clear(cm); }); 40 } 41 42 var CHUNK_SIZE = 8; 43 var Pos = CodeMirror.Pos; 44 var cmp = CodeMirror.cmpPos; 45 46 function coverRange(cm, from, to, addAt) { 47 if (cmp(from, to) == 0) return; 48 var array = cm.state.markedSelection; 49 var cls = cm.state.markedSelectionStyle; 50 for (var line = from.line;;) { 51 var start = line == from.line ? from : Pos(line, 0); 52 var endLine = line + CHUNK_SIZE, atEnd = endLine >= to.line; 53 var end = atEnd ? to : Pos(endLine, 0); 54 var mark = cm.markText(start, end, {className: cls}); 55 if (addAt == null) array.push(mark); 56 else array.splice(addAt++, 0, mark); 57 if (atEnd) break; 58 line = endLine; 59 } 60 } 61 62 function clear(cm) { 63 var array = cm.state.markedSelection; 64 for (var i = 0; i < array.length; ++i) array[i].clear(); 65 array.length = 0; 66 } 67 68 function reset(cm) { 69 clear(cm); 70 var ranges = cm.listSelections(); 71 for (var i = 0; i < ranges.length; i++) 72 coverRange(cm, ranges[i].from(), ranges[i].to()); 73 } 74 75 function update(cm) { 76 if (!cm.somethingSelected()) return clear(cm); 77 if (cm.listSelections().length > 1) return reset(cm); 78 79 var from = cm.getCursor("start"), to = cm.getCursor("end"); 80 81 var array = cm.state.markedSelection; 82 if (!array.length) return coverRange(cm, from, to); 83 84 var coverStart = array[0].find(), coverEnd = array[array.length - 1].find(); 85 if (!coverStart || !coverEnd || to.line - from.line < CHUNK_SIZE || 86 cmp(from, coverEnd.to) >= 0 || cmp(to, coverStart.from) <= 0) 87 return reset(cm); 88 89 while (cmp(from, coverStart.from) > 0) { 90 array.shift().clear(); 91 coverStart = array[0].find(); 92 } 93 if (cmp(from, coverStart.from) < 0) { 94 if (coverStart.to.line - from.line < CHUNK_SIZE) { 95 array.shift().clear(); 96 coverRange(cm, from, coverStart.to, 0); 97 } else { 98 coverRange(cm, from, coverStart.from, 0); 99 } 100 } 101 102 while (cmp(to, coverEnd.to) < 0) { 103 array.pop().clear(); 104 coverEnd = array[array.length - 1].find(); 105 } 106 if (cmp(to, coverEnd.to) > 0) { 107 if (to.line - coverEnd.from.line < CHUNK_SIZE) { 108 array.pop().clear(); 109 coverRange(cm, coverEnd.from, to); 110 } else { 111 coverRange(cm, coverEnd.to, to); 112 } 113 } 114 } 115 }); 116
